Final answer:
0.5 Wh of electrical energy is equal to 1.8 kJ of heat energy.
Step-by-step explanation:
0.5 Wh of electrical energy is equivalent to 16.2 kJ of heat energy. To convert from Wh to kJ, we use the fact that 1 Wh is equal to 3,600 J. So, by multiplying 0.5 Wh by 3,600 J, we get 1,800 J. To convert from J to kJ, we divide by 1,000, which gives us 1.8 kJ. Therefore, 0.5 Wh of electrical energy is equal to 1.8 kJ of heat energy.